The present invention relates to a process for preparing a N,N'-disubstituted nitro-para-phenylenediamine (I) according to the following scheme: ##STR1## X denoting a halogen and R a lower alkyl, lower mono- or polyhydroxyalkyl, lower alkoxyalkyl or lower aminoalkyl group, in which the amino group can be mono- or disubstituted with a lower alkyl or lower mono- or polyhydroxyalkyl group, the nitrogen atom of said amino group being able to form part of a heterocyclic system. The invention also relates to the intermediate oxazolidones of formulae (II) and (III), and the new nitro-para-phenylenediamines in which R denotes a lower alkoxyalkyl, lower polyhydroxyalkyl or lower aminoalkyl group, as well as the dyeing compositions for keratinous fibres containing these new nitro-para-phenylenediamines.
本发明涉及一种制备N,N'-二取代硝基
对苯二胺(I)的方法,根据以下方案:##STR1## 其中X表示卤素,R表示低烷基,低单或多羟基烷基,低烷氧基烷基或低
氨基烷基,其中
氨基可以是单取代或双取代的低烷基或低单或多羟基烷基,所述
氨基的氮原子能够成为杂环系统的一部分。本发明还涉及式(II)和(III)的中间体
噁唑烷酮,以及R表示低烷氧基烷基,低多羟基烷基或低
氨基烷基的新硝基
对苯二胺,以及含有这些新硝基
对苯二胺的角蛋白纤维
染料组合物。